Table of contents |
|
Introduction |
|
The Skeleton |
|
Parts of Skeleton |
|
Functions of the Skeletal System |
|
What is a Joint? |
|
Immovable Joints |
|
Movable Joints |
|
The human skeleton consists of the skull, ribcage, backbone, limbs and girdle (pectoral and pelvic girdle).
Parts of Human Skeleton
Which are the organs that the above given bones protect?
(i) Stomach
(ii) Lungs
(iii) Liver
(iv) Heart
Our body has two types of girdles - pectoral girdle, also called shoulder girdle, and pelvic girdle, also called hip girdle. The girdles help in joining the limb directly to the backbone. The girdles are fixed to the backbone and lie on either side.
The skeleton has the following functions:
Collar Bone
Ribcage
Kneecap
Backbone
To which body system do the bones in the list belong to?
![]() |
Download the notes
The Skeletal System
|
Download as PDF |
A joint is a location in our body where two bones meet. It is a junction between two or more bones. It allows movement and provides mechanical support to the body.
Cartilage is a type of elastic tissue, which keeps the bones from rubbing against each other. Bones are held together by strong tissues called ligaments. Our body has several joints. These joints may be movable or immovable.
Bones are held tightly together in an immovable joint. Cartilages are not present between the joints. The bones in the skull are immovable joints.
1. Hinge Joint
This joint is like a hinge in a door. This kind of joint only allows back and forth, i.e, they allow movement in one direction only. Hinge joints are found in the elbow, knees, fingers, toes, etc.
The ball and socket joint allow maximum movement. It is found in the hip and shoulder joints. In such a joint, one bone that ends in a ball fits into the socket of the other.
The joint which joins the skull to the backbone is the pivot joint. The rod-shaped end of one bone fits into the ring-type end of the other bone. In this case, the rod-shaped vertebral column (first two vertebrae) fits into a hole in the skull. This joint allows movement of our head from side by side, and up and down.
This kind of joint is found between the wrist and ankle and between the two vertebrae. It allows slight movement in all directions. It helps our wrist to bend, twist and turn at each point.
45 videos|202 docs|45 tests
|
1. What are the main parts of the skeleton? | ![]() |
2. What are the functions of the skeletal system? | ![]() |
3. What is a joint and why is it important? | ![]() |
4. What are immovable joints? | ![]() |
5. What are movable joints and what types are there? | ![]() |